FWIW, when installing we
1) switch the vCS database recovery models from SIMPLE into BULK-LOGGED and then when done we switch them back to SIMPLE.
2) We have had installs fail when left in Simple and at one time, I think even VMware recommended this during vCS installs.
3) We also preallocated the vCS DB to 20+GB with a max of 40+GB and the logs to 2GB/8GB Max as a performance enhancement.
Cheers.